/* ============================================
   VELORA - Travel Expense Tracker
   CSS con Material Design y Modo Día/Noche
   ============================================ */

/* CSS Variables - Design Tokens */
:root {
    /* Colores Primarios - Modo Día */
    --primary: #1976D2;
    --primary-dark: #1565C0;
    --primary-light: #BBDEFB;
    --accent: #FF5722;
    --accent-dark: #E64A19;

    /* Superficies y Fondos */
    --background: #F5F5F5;
    --surface: #FFFFFF;
    --surface-elevated: #FFFFFF;

    /* Texto */
    --text-primary: rgba(0, 0, 0, 0.87);
    --text-secondary: rgba(0, 0, 0, 0.60);
    --text-disabled: rgba(0, 0, 0, 0.38);
    --text-on-primary: #FFFFFF;
    --text-on-accent: #FFFFFF;

    /* Bordes y Divisores */
    --divider: rgba(0, 0, 0, 0.12);
    --border: rgba(0, 0, 0, 0.12);

    /* Estados */
    --hover-overlay: rgba(0, 0, 0, 0.04);
    --focus-overlay: rgba(0, 0, 0, 0.12);
    --pressed-overlay: rgba(0, 0, 0, 0.16);
    --selected-overlay: rgba(25, 118, 210, 0.12);

    /* Sombras (Elevations) */
    --elevation-1: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
    --elevation-2: 0 3px 6px rgba(0, 0, 0, 0.16), 0 3px 6px rgba(0, 0, 0, 0.23);
    --elevation-3: 0 10px 20px rgba(0, 0, 0, 0.19), 0 6px 6px rgba(0, 0, 0, 0.23);
    --elevation-4: 0 14px 28px rgba(0, 0, 0, 0.25), 0 10px 10px rgba(0, 0, 0, 0.22);

    /* Espaciado (8dp grid) */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;

    /* Bordes redondeados */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    /* Tipografía */
    --font-family: 'Roboto', sans-serif;

    /* Transiciones */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);

    /* Colores de Categorías */
    --cat-food: #FF9800;
    --cat-transport: #2196F3;
    --cat-entertainment: #9C27B0;
    --cat-accommodation: #4CAF50;
    --cat-shopping: #E91E63;
    --cat-health: #F44336;
    --cat-other: #607D8B;

    /* App Bar */
    --app-bar-height: 56px;
    --bottom-nav-height: 56px;
}

/* Modo Noche */
[data-theme="dark"] {
    --primary: #90CAF9;
    --primary-dark: #64B5F6;
    --primary-light: #2196F3;
    --accent: #FF5722;
    --accent-dark: #FF7043;

    --background: #121212;
    --surface: #1E1E1E;
    --surface-elevated: #2C2C2C;

    --text-primary: rgba(255, 255, 255, 0.87);
    --text-secondary: rgba(255, 255, 255, 0.60);
    --text-disabled: rgba(255, 255, 255, 0.38);
    --text-on-primary: rgba(0, 0, 0, 0.87);

    --divider: rgba(255, 255, 255, 0.12);
    --border: rgba(255, 255, 255, 0.12);

    --hover-overlay: rgba(255, 255, 255, 0.04);
    --focus-overlay: rgba(255, 255, 255, 0.12);
    --pressed-overlay: rgba(255, 255, 255, 0.16);
    --selected-overlay: rgba(144, 202, 249, 0.12);

    --elevation-1: 0 1px 3px rgba(0, 0, 0, 0.4), 0 1px 2px rgba(0, 0, 0, 0.48);
    --elevation-2: 0 3px 6px rgba(0, 0, 0, 0.48), 0 3px 6px rgba(0, 0, 0, 0.54);
    --elevation-3: 0 10px 20px rgba(0, 0, 0, 0.57), 0 6px 6px rgba(0, 0, 0, 0.54);
    --elevation-4: 0 14px 28px rgba(0, 0, 0, 0.75), 0 10px 10px rgba(0, 0, 0, 0.66);
}

/* Reset y Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: var(--font-family);
    background-color: var(--background);
    color: var(--text-primary);
    line-height: 1.5;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Tipografía Material */
h1, h2, h3, h4, h5, h6 {
    font-weight: 500;
    line-height: 1.2;
}

h1 { font-size: 1.5rem; }
h2 { font-size: 1.25rem; }
h3 { font-size: 1.125rem; }

.subtitle {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
}

/* ============================================
   APP BAR / TOP BAR
   ============================================ */
.app-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--app-bar-height);
    background-color: var(--primary);
    color: var(--text-on-primary);
    display: flex;
    align-items: center;
    padding: 0 var(--spacing-sm);
    box-shadow: var(--elevation-2);
    z-index: 100;
}

.app-bar-title {
    flex: 1;
    font-size: 1.25rem;
    font-weight: 500;
    margin: 0 var(--spacing-md);
}

.app-bar-actions {
    display: flex;
    gap: var(--spacing-xs);
}

/* ============================================
   ICON BUTTONS
   ============================================ */
.icon-btn {
    width: 40px;
    height: 40px;
    border: none;
    background: transparent;
    color: inherit;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: background-color var(--transition-fast);
}

.icon-btn:hover {
    background-color: var(--hover-overlay);
}

.icon-btn:active {
    background-color: var(--pressed-overlay);
}

.icon-btn .material-icons {
    font-size: 24px;
}

/* Ripple Effect */
.icon-btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.icon-btn:active::after {
    width: 100px;
    height: 100px;
}

/* ============================================
   MAIN CONTENT
   ============================================ */
.main-content {
    margin-top: var(--app-bar-height);
    margin-bottom: var(--bottom-nav-height);
    min-height: calc(100vh - var(--app-bar-height) - var(--bottom-nav-height));
    padding: var(--spacing-md);
}

/* ============================================
   SCREENS / VIEWS
   ============================================ */
.screen {
    display: none;
    animation: fadeIn var(--transition-normal);
    position: relative;
    z-index: 1;
}

.screen.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   CARDS
   ============================================ */
.card {
    background-color: var(--surface);
    border-radius: var(--radius-md);
    box-shadow: var(--elevation-1);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    transition: box-shadow var(--transition-fast);
    cursor: pointer;
}

.card:hover {
    box-shadow: var(--elevation-2);
}

.card:active {
    box-shadow: var(--elevation-1);
    background-color: var(--hover-overlay);
}

/* Trip Card */
.trip-card {
    position: relative;
}

.trip-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-sm);
}

.trip-card-title {
    font-size: 1.125rem;
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
}

.trip-card-subtitle {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.trip-card-dates {
    font-size: 0.75rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.trip-card-dates .material-icons {
    font-size: 16px;
}

.trip-card-budget {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.budget-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.875rem;
}

.budget-label {
    color: var(--text-secondary);
}

.budget-value {
    font-weight: 500;
}

.budget-value.warning {
    color: #FF9800;
}

.budget-value.danger {
    color: #F44336;
}

.budget-progress {
    height: 4px;
    background-color: var(--divider);
    border-radius: 2px;
    overflow: hidden;
    margin-top: var(--spacing-xs);
}

.budget-progress-bar {
    height: 100%;
    background-color: var(--primary);
    transition: width var(--transition-normal);
}

.budget-progress-bar.warning {
    background-color: #FF9800;
}

.budget-progress-bar.danger {
    background-color: #F44336;
}

/* Expense Item */
.expense-item {
    background-color: var(--surface);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    box-shadow: var(--elevation-1);
}

.expense-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.expense-icon .material-icons {
    color: white;
    font-size: 20px;
}

.expense-icon.cat-food { background-color: var(--cat-food); }
.expense-icon.cat-transport { background-color: var(--cat-transport); }
.expense-icon.cat-entertainment { background-color: var(--cat-entertainment); }
.expense-icon.cat-accommodation { background-color: var(--cat-accommodation); }
.expense-icon.cat-shopping { background-color: var(--cat-shopping); }
.expense-icon.cat-health { background-color: var(--cat-health); }
.expense-icon.cat-other { background-color: var(--cat-other); }

.expense-content {
    flex: 1;
    min-width: 0;
}

.expense-title {
    font-weight: 500;
    margin-bottom: 2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.expense-meta {
    font-size: 0.75rem;
    color: var(--text-secondary);
    display: flex;
    gap: var(--spacing-sm);
}

.expense-amount {
    font-size: 1rem;
    font-weight: 500;
    flex-shrink: 0;
}

/* ============================================
   TABS
   ============================================ */
.tabs {
    display: flex;
    background-color: var(--surface);
    border-bottom: 1px solid var(--divider);
    position: sticky;
    top: var(--app-bar-height);
    z-index: 10;
}

.tab {
    flex: 1;
    padding: var(--spacing-md) var(--spacing-sm);
    border: none;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    position: relative;
    transition: color var(--transition-fast);
}

.tab .material-icons {
    font-size: 20px;
}

.tab span {
    font-size: 0.75rem;
    font-weight: 500;
}

.tab.active {
    color: var(--primary);
}

.tab.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background-color: var(--primary);
}

.tab-content {
    display: none;
    padding: var(--spacing-md) 0;
    animation: fadeIn var(--transition-fast);
}

.tab-content.active {
    display: block;
}

/* ============================================
   FORMS
   ============================================ */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

input[type="text"],
input[type="number"],
input[type="date"],
input[type="datetime-local"],
textarea,
select {
    width: 100%;
    padding: var(--spacing-md);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background-color: var(--surface);
    color: var(--text-primary);
    font-family: var(--font-family);
    font-size: 1rem;
    transition: border-color var(--transition-fast);
}

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--primary);
}

textarea {
    resize: vertical;
    min-height: 80px;
}

/* Search Input */
.search-input {
    width: 100%;
    padding: var(--spacing-md);
    padding-left: var(--spacing-xl);
    border: none;
    border-radius: var(--radius-lg);
    background-color: var(--surface-elevated);
    color: var(--text-primary);
    font-size: 1rem;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24'%3E%3Cpath fill='%23666' d='M15.5 14h-.79l-.28-.27A6.471 6.471 0 0 0 16 9.5 6.5 6.5 0 1 0 9.5 16c1.61 0 3.09-.59 4.23-1.57l.27.28v.79l5 4.99L20.49 19l-4.99-5zm-6 0C7.01 14 5 11.99 5 9.5S7.01 5 9.5 5 14 7.01 14 9.5 11.99 14 9.5 14z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: var(--spacing-sm) center;
    background-size: 20px;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--radius-sm);
    font-family: var(--font-family);
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.btn .material-icons {
    font-size: 18px;
}

.btn-primary {
    background-color: var(--primary);
    color: var(--text-on-primary);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    box-shadow: var(--elevation-2);
}

.btn-secondary {
    background-color: transparent;
    color: var(--primary);
    border: 1px solid var(--primary);
}

.btn-secondary:hover {
    background-color: var(--selected-overlay);
}

.btn-text {
    background-color: transparent;
    color: var(--primary);
}

.btn-text:hover {
    background-color: var(--hover-overlay);
}

.btn:disabled {
    opacity: 0.38;
    cursor: not-allowed;
}

.btn-block {
    width: 100%;
}

/* ============================================
   FLOATING ACTION BUTTON (FAB)
   ============================================ */
.fab {
    position: fixed;
    bottom: calc(var(--bottom-nav-height) + var(--spacing-md));
    right: var(--spacing-md);
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background-color: var(--accent);
    color: var(--text-on-accent);
    border: none;
    box-shadow: var(--elevation-3);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    z-index: 50;
}

.fab:hover {
    box-shadow: var(--elevation-4);
    transform: scale(1.05);
}

.fab:active {
    box-shadow: var(--elevation-2);
    transform: scale(0.95);
}

.fab .material-icons {
    font-size: 24px;
}

/* ============================================
   BOTTOM NAVIGATION
   ============================================ */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--bottom-nav-height);
    background-color: var(--surface);
    border-top: 1px solid var(--divider);
    display: flex;
    z-index: 150;
    box-shadow: var(--elevation-3);
}

.nav-item {
    flex: 1;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    cursor: pointer;
    transition: color var(--transition-fast);
}

.nav-item .material-icons {
    font-size: 24px;
}

.nav-item span {
    font-size: 0.75rem;
}

.nav-item.active {
    color: var(--primary);
}

/* ============================================
   MODAL / DIALOG
   ============================================ */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 200;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
    animation: fadeIn var(--transition-fast);
}

.modal-overlay.active {
    display: flex;
}

.modal {
    background-color: var(--surface);
    border-radius: var(--radius-md);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: var(--elevation-4);
    animation: slideUp var(--transition-normal);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    padding: var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--divider);
}

.modal-header h2 {
    margin: 0;
}

.modal-content {
    padding: var(--spacing-md);
    overflow-y: auto;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    border-top: 1px solid var(--divider);
}

/* ============================================
   BOTTOM SHEET
   ============================================ */
.bottom-sheet-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 200;
    animation: fadeIn var(--transition-fast);
}

.bottom-sheet-overlay.active {
    display: block;
}

.bottom-sheet {
    position: fixed;
    bottom: -100%;
    left: 0;
    right: 0;
    background-color: var(--surface);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    max-height: 80vh;
    transition: bottom var(--transition-normal);
    box-shadow: var(--elevation-4);
}

.bottom-sheet-overlay.active .bottom-sheet {
    bottom: 0;
}

.bottom-sheet-handle {
    width: 32px;
    height: 4px;
    background-color: var(--divider);
    border-radius: 2px;
    margin: var(--spacing-sm) auto;
}

.bottom-sheet-content {
    padding: 0 var(--spacing-md) var(--spacing-md);
    max-height: calc(80vh - 32px);
    overflow-y: auto;
}

/* ============================================
   TOAST / SNACKBAR
   ============================================ */
.toast {
    position: fixed;
    bottom: calc(var(--bottom-nav-height) + var(--spacing-md));
    left: var(--spacing-md);
    right: var(--spacing-md);
    background-color: #323232;
    color: white;
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    box-shadow: var(--elevation-3);
    z-index: 300;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    transform: translateY(100px);
    opacity: 0;
    transition: all var(--transition-normal);
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

/* ============================================
   EMPTY STATE
   ============================================ */
.empty-state {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
    color: var(--text-secondary);
}

.empty-state.small {
    padding: var(--spacing-lg) var(--spacing-md);
}

.empty-icon {
    font-size: 64px !important;
    opacity: 0.3;
    margin-bottom: var(--spacing-md);
}

.empty-state h2 {
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

/* ============================================
   FILTERS
   ============================================ */
.expenses-filters {
    margin-bottom: var(--spacing-md);
}

.filter-chips {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    margin-top: var(--spacing-sm);
}

.chip {
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border);
    background-color: var(--surface);
    color: var(--text-primary);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.chip:hover {
    background-color: var(--hover-overlay);
}

.chip.active {
    background-color: var(--primary);
    color: var(--text-on-primary);
    border-color: var(--primary);
}

.chip .material-icons {
    font-size: 16px;
}

/* ============================================
   TRIP DETAIL HEADER
   ============================================ */
.trip-detail-header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--text-on-primary);
    padding: var(--spacing-lg) var(--spacing-md);
    margin: calc(var(--spacing-md) * -1);
    margin-bottom: var(--spacing-md);
}

.trip-detail-title {
    font-size: 1.5rem;
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
}

.trip-detail-subtitle {
    opacity: 0.9;
    margin-bottom: var(--spacing-md);
}

.trip-detail-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.stat-item {
    background-color: rgba(255, 255, 255, 0.1);
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
}

.stat-label {
    font-size: 0.75rem;
    opacity: 0.8;
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-value {
    font-size: 1.25rem;
    font-weight: 500;
}

/* ============================================
   DASHBOARD
   ============================================ */
.dashboard-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.stat-card {
    background-color: var(--surface);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    box-shadow: var(--elevation-1);
}

.stat-card-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-card-value {
    font-size: 1.5rem;
    font-weight: 500;
}

.chart-container {
    background-color: var(--surface);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    box-shadow: var(--elevation-1);
}

.chart-container h3 {
    margin-bottom: var(--spacing-md);
}

#categoryChart {
    max-width: 100%;
    margin: 0 auto;
    display: block;
}

.chart-legend {
    margin-top: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.legend-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-xs) 0;
}

.legend-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.legend-color {
    width: 16px;
    height: 16px;
    border-radius: var(--radius-sm);
}

.legend-value {
    font-weight: 500;
}

/* ============================================
   MAP & ROUTE
   ============================================ */
.routes-container {
    position: relative;
    z-index: 1;
}

.map-container {
    height: 400px;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--elevation-1);
    margin-top: var(--spacing-md);
    position: relative;
    z-index: 1;
}

.route-controls {
    background-color: var(--surface);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    box-shadow: var(--elevation-1);
    margin-bottom: var(--spacing-md);
}

.location-input-group {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

.location-input {
    flex: 1;
}

.search-results {
    max-height: 200px;
    overflow-y: auto;
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    margin-top: var(--spacing-xs);
    display: none;
}

.search-results.active {
    display: block;
}

.search-result-item {
    padding: var(--spacing-md);
    cursor: pointer;
    border-bottom: 1px solid var(--divider);
    transition: background-color var(--transition-fast);
}

.search-result-item:last-child {
    border-bottom: none;
}

.search-result-item:hover {
    background-color: var(--hover-overlay);
}

.search-result-name {
    font-weight: 500;
    margin-bottom: 2px;
}

.search-result-address {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.route-info {
    background-color: var(--surface-elevated);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-top: var(--spacing-md);
    display: none;
}

.route-info.active {
    display: block;
}

.route-info-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.route-info-item:last-child {
    margin-bottom: 0;
}

.route-info-item .material-icons {
    color: var(--primary);
}

/* ============================================
   SETTINGS
   ============================================ */
.settings-section {
    margin-bottom: var(--spacing-lg);
}

.settings-section h3 {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-md);
    padding: 0 var(--spacing-md);
}

.settings-item {
    background-color: var(--surface);
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--divider);
}

.settings-item.clickable {
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.settings-item.clickable:hover {
    background-color: var(--hover-overlay);
}

.settings-item-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    flex: 1;
}

.settings-item-content .material-icons {
    color: var(--text-secondary);
}

.settings-item-title {
    font-weight: 500;
    margin-bottom: 2px;
}

.settings-item-subtitle {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Toggle Switch */
.switch {
    position: relative;
    display: inline-block;
    width: 48px;
    height: 24px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--border);
    transition: var(--transition-fast);
    border-radius: 24px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 2px;
    bottom: 2px;
    background-color: white;
    transition: var(--transition-fast);
    border-radius: 50%;
    box-shadow: var(--elevation-1);
}

input:checked + .slider {
    background-color: var(--primary);
}

input:checked + .slider:before {
    transform: translateX(24px);
}

/* ============================================
   UTILITIES
   ============================================ */
.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-md { margin-top: var(--spacing-md); }
.mb-md { margin-bottom: var(--spacing-md); }
.hidden { display: none !important; }

/* ============================================
   ROUTE MAP STYLING
   ============================================ */
.route-map {
    height: 300px;
    position: relative;
    z-index: 1;
}

.route-map .leaflet-container {
    position: relative;
    z-index: 1;
}

@media (max-width: 600px) {
    .route-map {
        height: 200px;
        max-height: calc(100vh - var(--app-bar-height) - var(--bottom-nav-height) - 200px);
    }
}

/* ============================================
   MENU BUTTON (Hamburger)
   ============================================ */
.menu-btn {
    color: var(--text-on-primary);
    visibility: visible;
    opacity: 1;
}

.menu-btn .material-icons {
    font-size: 24px;
    color: var(--text-on-primary);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 600px) {
    .main-content {
        padding: var(--spacing-sm);
    }

    .dashboard-stats {
        grid-template-columns: 1fr;
    }

    .trip-detail-stats {
        grid-template-columns: 1fr;
    }

    /* Ensure hamburger menu is visible on mobile */
    .menu-btn {
        display: flex;
        visibility: visible;
        opacity: 1;
    }

    .app-bar {
        padding: 0 var(--spacing-sm);
    }

    .app-bar-actions {
        gap: var(--spacing-xs);
    }

    .icon-btn {
        width: 40px;
        height: 40px;
    }
}

/* ============================================
   INTRO SCREEN (SPLASH SCREEN)
   ============================================ */
.intro-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    opacity: 1;
    transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}

/* Efecto de fondo animado */
.intro-overlay::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.05) 0%, transparent 50%);
    animation: introBackgroundShift 15s ease-in-out infinite;
}

.intro-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.intro-content {
    text-align: center;
    color: white;
    animation: introSlideUp 0.8s cubic-bezier(0.34, 1.56, 0.64, 1) 0.2s backwards;
    position: relative;
    z-index: 1;
}

.intro-logo {
    font-size: 140px;
    margin-bottom: var(--spacing-xl);
    animation: introIconBounce 1.2s cubic-bezier(0.68, -0.55, 0.265, 1.55) 0.4s backwards;
    filter: drop-shadow(0 10px 30px rgba(0, 0, 0, 0.2));
    line-height: 1;
}

.intro-logo i {
    display: inline-block;
    animation: introIconSpin 20s linear infinite;
}

.intro-title {
    font-size: 3rem;
    font-weight: 800;
    margin: 0 0 var(--spacing-sm) 0;
    letter-spacing: 2px;
    animation: introTitleFadeIn 0.8s ease-out 0.6s backwards;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.intro-subtitle {
    font-size: 1.2rem;
    margin: 0 0 var(--spacing-xl) 0;
    opacity: 0.95;
    font-weight: 400;
    letter-spacing: 0.5px;
    animation: introSubtitleFadeIn 0.8s ease-out 0.8s backwards;
}

.intro-loading-container {
    width: 280px;
    height: 6px;
    background-color: rgba(255, 255, 255, 0.25);
    border-radius: 3px;
    margin-top: var(--spacing-xl);
    overflow: hidden;
    animation: introFadeIn 0.6s ease-out 1s backwards;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

.intro-loading-bar {
    height: 100%;
    background: linear-gradient(90deg,
        rgba(255, 255, 255, 1) 0%,
        rgba(255, 255, 255, 0.9) 50%,
        rgba(255, 255, 255, 0.7) 100%);
    width: 0%;
    transition: width 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 0 15px rgba(255, 255, 255, 0.6),
                inset 0 1px 2px rgba(255, 255, 255, 0.3);
    border-radius: 3px;
}

/* Keyframe Animations */
@keyframes introBackgroundShift {
    0%, 100% {
        transform: translate(0, 0);
    }
    50% {
        transform: translate(20px, 20px);
    }
}

@keyframes introSlideUp {
    from {
        opacity: 0;
        transform: translateY(60px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes introIconBounce {
    0% {
        opacity: 0;
        transform: scale(0) translateY(40px);
    }
    50% {
        opacity: 1;
    }
    100% {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

@keyframes introIconSpin {
    0% {
        transform: rotateZ(0deg);
    }
    100% {
        transform: rotateZ(360deg);
    }
}

@keyframes introTitleFadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes introSubtitleFadeIn {
    from {
        opacity: 0;
        transform: translateY(15px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes introFadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* ============================================
   PROGRESS BAR
   ============================================ */
.progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background-color: transparent;
    z-index: 9999;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary) 0%, var(--accent) 100%);
    width: 0%;
    transition: width 0.3s ease;
    box-shadow: 0 0 10px rgba(25, 118, 210, 0.6);
}

.progress-bar-fill.active {
    animation: progressPulse 1s ease-in-out infinite;
}

@keyframes progressPulse {
    0% { box-shadow: 0 0 10px rgba(25, 118, 210, 0.6); }
    50% { box-shadow: 0 0 20px rgba(25, 118, 210, 0.8); }
    100% { box-shadow: 0 0 10px rgba(25, 118, 210, 0.6); }
}

/* ============================================
   LOADING SPINNER
   ============================================ */
.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--divider);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: var(--spacing-lg) auto;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}